Science General · Geography

Astronomy and Celestial Phenomena

1,884 Questions

This section provides practice questions on astronomy and celestial phenomena, focusing on eclipses, planetary movements, and tides. These concepts are commonly tested in general science sections of various competitive exams. Use this hub to practice questions related to the Earth, Moon, and solar system dynamics.

Solar and lunar eclipsesEquinoxes and solsticesPlanetary movementsOcean tidesCoriolis effectMeteor showers

Astronomy and Celestial Phenomena Questions

Multiple choice

Solar eclipse takes place when

  1. the moon comes between the sun and the earth

  2. the earth comes between the sun and the moon

  3. the sun comes between the moon and the earth

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A solar eclipse occurs when the Moon passes between the Sun and Earth, casting a shadow on Earth. Option B describes a lunar eclipse (Earth between Sun and Moon), while option C is astronomically impossible as the Sun cannot come between Moon and Earth.

Multiple choice

Light year is a unit of

  1. intensity of light

  2. distance

  3. time

  4. planetary motion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A light year is a unit of DISTANCE, not time. It represents the distance light travels in one vacuum year (approximately 9.46 trillion kilometers). Astronomers use it to measure vast interstellar and intergalactic distances.

Multiple choice

In polar regions the sun does not set for _____ months.

  1. eight

  2. six

  3. five

  4. seven
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Polar regions are the regions situated near the poles, i.e., North Pole and South Pole. Canada, Greenland, Iceland, Norway, Sweden are the places that belong to polar regions. These regions are very cold; here the sun does not set for six months and for the other six months, it does not rise.

Multiple choice

What are the phases of moon caused by?

  1. The rotation of Earth on it's axis

  2. The rotation of the moon on it's axis

  3. The revolution of Earth around the sun

  4. The revolution of the moon around Earth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The phases of the moon are caused by its changing position relative to the Earth and the sun as it orbits our planet. As the moon revolves around Earth, we see varying portions of its illuminated half, creating the monthly cycle of phases.

Multiple choice

The practice of advancing the clocks in spring and readjusting them in autumn is called ____.

  1. summer solistice

  2. daylight saving

  3. winter time set

  4. winter solistice
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Daylight saving time (DST) is the practice of advancing clocks by one hour during warmer months (spring) and readjusting them back in autumn. This is done to make better use of natural daylight and conserve energy. The terms 'solstice' refer to astronomical events, not clock adjustments.

Multiple choice

If candle is to artificial source of light , than moon is to _______.

  1. opaque object

  2. luminous object

  3. natural source of light

  4. satellite
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sun, stars and fireflies are the examples of natural sources of light and also are the luminous objects. Moon   is also a natural source of light through it is non-luminous. Electric bulb, torch streetlight and candle are not natural object as they are being industrially prepared but as they emit their own light so are known as artificial source of light. So moon is a natural source of light.

Multiple choice

The distance between the Earth and the Sun is greatest during

  1. winter solistice

  2. perihelion

  3. aphelion

  4. summer solistice
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aphelion is the point in Earth's orbit where it is farthest from the Sun, occurring around July 4 each year. At aphelion, Earth is about 152 million kilometers from the Sun. Perihelion (closest approach) occurs in early January.

Multiple choice

Tides are the highest

  1. when the earth is nearest to the sun

  2. when the earth is nearest to the moon

  3. in the spring

  4. when the sun, the moon and the earth are in line
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Spring tides, which are the highest tides, occur when the gravitational pulls of both the sun and the moon are combined because the sun, moon, and Earth are aligned in a straight line during full and new moons.